Add MiniMessage support for legacy color conversion in NPC Text script and implement entity tracking in ScriptApi

src/main/java/net/jstom/script/ScriptApi.java

@@ -4,6 +4,7 @@ import net.minestom.server.MinecraftServer;
 import net.minestom.server.event.Event;
 import net.minestom.server.event.EventNode;
 import net.minestom.server.entity.EntityType;
+import net.minestom.server.entity.Entity;
 import org.graalvm.polyglot.Value;
 
 import java.util.ArrayList;
@@ -15,6 +16,7 @@ import java.lang.reflect.Modifier;
 
 public class ScriptApi {
     private final List<EventNode<Event>> registeredNodes = new ArrayList<>();
+    private final List<Entity> trackedEntities = new ArrayList<>();
     private static final Map<String, EntityType> entityTypes = new HashMap<>();
 
     static {
@@ -71,12 +73,28 @@ public class ScriptApi {
         }
     }
 
+    public void track(Entity entity) {
+        if (entity != null) {
+            synchronized (trackedEntities) {
+                trackedEntities.add(entity);
+            }
+        }
+    }
+
     public void cleanup() {
         System.out.println("[JStom] Cleaning up " + registeredNodes.size() + " event nodes...");
         for (var node : registeredNodes) {
             MinecraftServer.getGlobalEventHandler().removeChild(node);
         }
         registeredNodes.clear();
+
+        System.out.println("[JStom] Removing " + trackedEntities.size() + " tracked entities...");
+        synchronized (trackedEntities) {
+            for (Entity entity : trackedEntities) {
+                entity.remove();
+            }
+            trackedEntities.clear();
+        }
     }
     
     public void log(String message) {